Zobrazeno 1 - 10
of 106
pro vyhledávání: '"Degrande, Celine"'
Autor:
Degrande, Céline, Maltoni, Matteo
We illustrate the importance of interference revival when higher order corrections are included, by presenting LO and NLO differential cross-sections and $K$-factors for three processes that are sensitive to the dimension-6 SMEFT operator $O_W$ : $Z$
Externí odkaz:
http://arxiv.org/abs/2403.16894
We study the effects of four-heavy-quark operators in the production of top quarks in the framework of the Standard Model Effective Field Theory (SMEFT) at the LHC. In particular, we compute for the first time the total contribution of the four-top-q
Externí odkaz:
http://arxiv.org/abs/2402.06528
Autor:
Darmé, Luc, Degrande, Céline, Duhr, Claude, Fuks, Benjamin, Goodsell, Mark, Heinrich, Gudrun, Hirschi, Valentin, Höche, Stefan, Höfer, Marius, Isaacson, Joshua, Mattelaer, Olivier, Ohl, Thorsten, Pagani, Davide, Reuter, Jürgen, Richardson, Peter, Schumann, Steffen, Shao, Hua-Sheng, Siegert, Frank, Zaro, Marco
Publikováno v:
Eur.Phys.J.C 83 (2023) 631
We present an update of the Universal FeynRules Output model format, commonly known as the UFO format, that is used by several automated matrix-element generators and high-energy physics software. We detail different features that have been proposed
Externí odkaz:
http://arxiv.org/abs/2304.09883
Autor:
Degrande, Céline, Li, Hao-Lin
We for the first time identify all the dimension-8 (dim-8) SMEFT operators that can have an interference with the SM with $E^4/\Lambda^4$ enhancement in the high energy limit for the processes $q\bar{q}\to WW/WZ$. Our results therefore explicitly sho
Externí odkaz:
http://arxiv.org/abs/2303.10493
In this work, we study indirect photon signatures of leptophilic dark matter (DM) coming from Centaurus A, where a DM density spike is believed to have survived to date contrary to the case of our galaxy. We consider a model where DM is a Majorana fe
Externí odkaz:
http://arxiv.org/abs/2201.07247
Autor:
Brivio, Ilaria, Dawson, Sally, de Blas, Jorge, Durieux, Gauthier, Petrucciani, Giovanni, Savard, Pierre, Berger, Nicolas, Contino, Roberto, Degrande, Céline, Falkowski, Adam, Goertz, Florian, Gritsan, Andrei V., Grojean, Christophe, Lohwasser, Kristin, Maltoni, Fabio, Mimasu, Ken, Panico, Giuliano, Riva, Francesco, Shepherd, William, Vryonidou, Eleni, Wulzer, Andrea, Zhang, Cen
The truncation of the standard-model effective field theory, its validity and the associated uncertainties have been discussed in meetings of the LHC EFT WG. Proposals were made by participants to address these issues. No consensus was reached and no
Externí odkaz:
http://arxiv.org/abs/2201.04974
Conventional indirect dark matter (DM) searches look for an excess in the electromagnetic emission from the sky that cannot be attributed to known astrophysical sources, but its polarisation has not been explored to date. In this proceeding, we argue
Externí odkaz:
http://arxiv.org/abs/2110.06004
Autor:
Degrande, Céline, Touchèque, Julien
We show that only 10 (17) CP-odd operators of the SMEFT give the leading, i.e. least suppressed by the new physics scale, CP-violating contributions once we assume that all fermions are massless but the top (and bottom) quark(s). We start with a shor
Externí odkaz:
http://arxiv.org/abs/2110.02993
Circular polarisation of gamma rays as a probe of dark matter interactions with cosmic ray electrons
Conventional indirect dark matter (DM) searches look for an excess in the electromagnetic emission from the sky that cannot be attributed to known astrophysical sources. Here, we argue that the photon polarisation is an important feature to understan
Externí odkaz:
http://arxiv.org/abs/2103.14658
Autor:
Degrande, Celine, Maltoni, Matteo
Publikováno v:
Phys. Rev. D 103, 095009 (2021)
Interferences are not positive-definite and therefore they can change sign over the phase space. If the contributions of the regions where the interference is positive and negative nearly cancel each other, interference effects are hard to measure. I
Externí odkaz:
http://arxiv.org/abs/2012.06595